My first serious girlfriend was a natural redhead (with 100% of the crazy that goes along with the coloring). And then one day she went and changed it to blonde. That would be remembered as "the day no kittens died" at our college.

TheShavingofOccam123:I would like to know where the other 20% of redheads get their red hair from. I know the Neanderthals had a different genetic basis for their red hair.

So far no modern human has shown up who has the Neanderthal red hair gene. That could be an accident of genetics, or it's so rare no one has found it yet by chance, or there could be something defective about Neanderthal red hair that made it die out.

Jacob_Roberson:TheShavingofOccam123: I would like to know where the other 20% of redheads get their red hair from. I know the Neanderthals had a different genetic basis for their red hair.

So far no modern human has shown up who has the Neanderthal red hair gene. That could be an accident of genetics, or it's so rare no one has found it yet by chance, or there could be something defective about Neanderthal red hair that made it die out.

Jacob_Roberson:TheShavingofOccam123: I would like to know where the other 20% of redheads get their red hair from. I know the Neanderthals had a different genetic basis for their red hair.

So far no modern human has shown up who has the Neanderthal red hair gene. That could be an accident of genetics, or it's so rare no one has found it yet by chance, or there could be something defective about Neanderthal red hair that made it die out.

Well something like less than 1% of 1% of people have had any manner of genetic testing done to them so even IF there are people with Neanderthal red there is like a 99.99+% chance it would not be one of the people who have been sampled.

If a recessive gene was really a genetic mutation it would have been bred out, or only exist in very small numbers, long ago. One person suddenly has the mutation, and anyone they could possibly breed with would not have it, so it wouldn't even have a strong start.